usuń niewymiernosci z mianownika:
2
________
2+(pierwistek z 5) =
2
____
(3 pierwiastki z 3)+1=
3
___
3-(3 pierwiastki z 3)
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a) 2 / 2+√5=
=2×(-√5) /2+ √5×(-√5)=
=-2√5 / 2-5=
=2√5 / 3
b) 2 / 3√3+1=
=2x(-3√3) / (3√3)x(-3√3)+1=
=-6√3 / -28=
=3√3 / 14
c) 3 / 3-(3√3)=
=3x(-3√3) / 3-(3√3)x(-3√3)=
=-9√3 / 30=
= -3√3 / 10